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 103,950 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Neuroendocrine neoplasms of the larynx have been divided into those of epithelial or neural origin. The latter consist of paragangliomas while the epithelial origin group can be divided into the typical and atypical carcinoids and small cell neuroendocrine carcinomata, the latter consisting of the oat cell type, the intermediate cell type and the combined cell type. There are now over 500 cases of neuroendocrine neoplasms of the larynx in the literature. The diagnosis is primarily based on light microscopy, and, in some instances, it may be supported by special histochemical studies. It should be confirmed by immunocytochemical and/or ultrastructural investigation. The different biological behaviour of neuroendocrine neoplasms of the larynx makes a specific diagnosis of paramount importance, since treatment depends on diagnostic accuracy. Typical carcinoid is an extremely rare lesion. It is treated preferably by conservative surgery; elective neck dissection is not necessary because of the lack of lymph node metastases at diagnosis. Chemotherapy and/or radiotherapy have not been effective in the limited number of patients treated thus far. Prognosis is excellent with cure following surgery. Atypical carcinoid is the most frequent non-squamous carcinoma of the larynx. The mainstay of treatment is surgery. Elective neck dissection should be performed because of the high likelihood of cervical lymph node metastases. Primary radiation therapy with adjuvant chemotherapy is not indicated. The survival rate is 48 per cent at five years and 30 per cent at 10 years. Although the larynx is one of its most common extrapulmonary sites, small cell neuroendocrine carcinoma is still a rare tumour. Surgical results for this tumour have been disappointing and is reserved for cases of local relapse with no evidence of metastasis. Chemotherapy and radiotherapy currently appear to offer the least disabling and most effective forms of therapy. The two- and five-year survival rates are 16 per cent and five per cent, respectively. Paraneoplastic syndromes have occasionally been reported in association with carcinoid tumours (typical and atypical) and small cell neuroendocrine carcinoma. There have been also rare reports of an elevated neuropeptide serum level. Paraganglioma is the only laryngeal neuroendocrine neoplasm with a female preponderance (3:1). Confusion with atypical carcinoid has led to incorrect diagnosis and inappropriate classification schemes, erroneously suggesting that laryngeal paraganglioma has the potential for aggressive behaviour. Conservative surgery represents the treatment of choice; elective neck dissection is not necessary, and the prognosis is excellent.
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PMID:A review of neuroendocrine neoplasms of the larynx: update on diagnosis and treatment. 987 71

Typical carcinoid bronchial tumour is a well-known disease that, for years, was considered benign. Currently, it is classified within the group of neuro-endocrine lung tumours. It is a low-grade malignancy tumour with a capability of local and distant recurrence. Complete resection with mediastinal lymphadenectomy is the treatment-of-choice. There are, usually, long-term survivors, even in cases of recurrence or mediastinal node invasion. These patients could benefit from removal of recurrent or metastatic disease. We present, here, a case of a 19-years-old female diagnosed as having N1-bronchial typical carcinoid tumour. She underwent radical surgery, but with mediastinal recurrence and hepatic metastases. A new radical lung resection was performed, and a liver transplant was the therapy-of-choice for the metastatic lesion.
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PMID:Local recurrence and metastatic disease in a typical N1 carcinoid bronchial tumour. 1596 Sep 34

Neuroendocrine tumors of the lung represent a broad spectrum of morphologic types that share specific morphologic, immunohistochemical, ultrastructural, and molecular characteristics. The classification of neuroendocrine lung tumors has changed over the last decades and currently four categories are distinguished: typical carcinoid tumor, atypical carcinoid tumor, large cell neuroendocrine carcinoma and small cell carcinoma. Neuroendocrine tumors of the lung comprise approximately 20% of all primary lung cancers. Among them, the most frequent is small cell carcinoma (13-17%). Because of differences in clinical behavior, therapy, and prognosis, a reliable histological diagnosis, as well as clinical and pathological staging system are essential for an appropriate medical proceedings. The most effective treatment of bronchial carcinoids and large cell neuroendocrine carcinoma in an early stage is complete surgical resection, whereas chemotherapy remains the primary treatment for small cell carcinoma. All carcinoids are malignant tumors with the potential to metastasize. The majority of patients with pulmonary carcinoid have an excellent survival, even if they present with lymph node metastases. Large cell neuroendocrine and small cell carcinoma progress rapidly and are generally widespread at the moment of diagnosis. Their overall prognosis is poor. Increased knowledge about pulmonary neuroendocrine tumors biology and the genetic characteristics, imply that carcinoid tumors appear to have a different etiology and pathogenesis than large cell neuroendocrine and small cell carcinoma. In practice, it could be easiest to conceptualize this group of pulmonary tumors as a spectrum of malignancy ranging from the low grade typical carcinoid to the highly malignant large cell neuroendocrine and small cell carcinoma. Typical carcinoid tumors associated with a fairly benign behavior should be classified as low-grade neuroendocrine tumor/carcinoma (G1) and atypical carcinoid tumors as intermediate-grade tumor/carcinoma (G2). Whereas, large cell neuroendocrine and small cell carcinoma should be grouped together under the designation of high-grade neuroendocrine tumor/carcinoma (G3).
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PMID:[Pulmonary neuroendocrine tumors. The spectrum of histologic subtypes and current concept on diagnosis and treatment]. 2016 17

Pulmonary neuroendocrine tumors comprise 20% of all lung cancers. They are separated into 4 subgroups: typical carcinoid tumor, atypical carcinoid tumor, large-cell neuroendocrine carcinoma, and small-cell lung carcinoma. The major symptoms present in 60% of patients are cough, hemoptysis, and obstructive pneumonia. They may also exhibit hormonally related symptoms e.g. carcinoid syndrome. Small cell lung cancer is the most common subgroup, with rapid progression, aggressive metastatic potential and the worst prognosis. Large cell neuroendocrine carcinoma is rare but also has a poor prognosis. Typical carcinoid may be accompanied with hormone related symptoms and has the best prognosis; atypical one on the contrary may cause lymph node and distant metastases in half of the cases. Elevated plasma levels of chromogranin-A are present in majority of pulmonary neuroendocrine tumors and act as tumor marker. The mainstay of treatment is radical surgery if possible. In locally advanced or metastatic disease combination chemotherapy and somatostatin-analogues may have beneficial effect. This review focuses on the general features, and current diagnostic options of pulmonary neuroendocrine tumors.
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PMID:[Symptoms and diagnostics of lung neuroendocrine tumors]. 2135 52

The pulmonary neuroendocrine neoplasms originate from the enterochromaffin cells which are diffusely distributed in the body. The incidence of these tumors has increased significantly in recent decades due to the available diagnostics. They make up about 1-2% of all lung tumors and 20-30% of all neuroendocrine neoplasms. The current WHO classification from 2004 divides them into typical carcinoids (TC), atypical carcinoids (AC), large cell neuroendocrine carcinomas (LCNEC) and small cell carcinomas (SCLC). The major neuroendocrine biomarkers are chromogranin A, synaptophysin and CD56. TC have a low mitotic rate of <2 mitoses/2mm(2) (10 HPF), whereas the mitotic rate of the AC is 2-10 mitoses/2 mm(2) (10 HPF). The Ki-67 staining is helpful to distinguish typical and atypical carcinoids from the highly malignant LCNEC and SCLC. Clinically, the patient presents usually with cough, hemoptysis or bronchial obstruction. The occurrence of a carcinoid or Cushing's syndrome and a tumor-associated acromegaly are rare. Surgical resection with radical lymph node dissection is the treatment of choice for achieving long-term survival. Endoscopic resection of the endobronchial tumor growth is a good alternative for inoperable endobronchially localized tumors. Peptide receptor radionuclide therapy (PRRT) is a promising treatment option for patients with metastatic or unresectable pulmonary neuroendocrine tumors. New targeted therapies using angiogenesis inhibitors, mTOR inhibitors, and tyrosine kinase inhibitors are being tested for their effectiveness in many previous studies. Typical carcinoid tumors metastasize less frequently than AC, the 5-year survival rate of patients with TC being over 90%. Patients with AC have a 5-year survival rate between 35% and 87%. The highly malignant LCNEC and SCLC, on the other hand, have a 5-year survival rate between 15% and 57%, and <5% respectively. The increasing number of therapeutic options and diagnostic procedures requires a multidisciplinary approach and decision-making in multidisciplinary tumor conferences to ensure a personalized treatment approach. Therefore patients with a neuroendocrine neoplasm of the lung should be treated in specialized centers.
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PMID:[Pulmonary neuroendocrine neoplasms]. 2500 41